Cellophane-cuckoo Bees are obligate cleptoparasites of Cellophane Bees (Colletes). Most are host specific and target one of the summer or fall Cellophane Bee. Two species make up the vast majority of the records for Vermont, but several other rare species are present and likely to be identifiable from photos.
Genus level ID – These black and white bees form a distinct group with Long-horned Cuckoo Bees (Genus Triepeolus). Some species in both genera are distinctive, but other individuals are hard to assign to genus from photos. Cellophane Cuckoo Bees tend to be smaller and most species have small red patches on the thorax (unlike Long-horned Cuckoos).
Unless otherwise specified, photos are copyright of Spencer Hardy.